Triple Offset Butterfly Valve (TOV) | Metal Seated, Class V

Name: Reguvale Triple Offset Butterfly Valve
Brand: Reguvale
Availability: InStock

Triple offset butterfly valve with metal seat - Reguvale

Triple Offset Butterfly Valve — Metal-Seated, Zero-Friction

Class V Shutoff · Up to 550°C · Oil & Gas · Steam · Fire Safe

Reguvale’s triple offset butterfly valve (TOV) uses three geometric offsets so the metal disc contacts the seat only at the fully closed position — zero rubbing, zero friction, and metal-to-metal Class V bubble-tight shutoff.

Engineered for severe service: saturated and superheated steam up to 550°C, oil & gas pipelines, LNG, chemical processing and power generation. The TOV replaces gate and globe valves at a fraction of the weight and cost, with quarter-turn speed and fire-safe construction.

Body materials: ductile iron GGG50, carbon steel WCB, stainless steel CF8/CF8M. Seat: metal-to-metal (SS316 / hard-faced alloy). Flanged ends per EN 1092 / ASME B16.5. Available with manual gear, pneumatic or electric actuation.

DN50–DN2000 PN16/PN25/PN40 Class V Leakage -196°C to +550°C Fire Safe ISO 5211 Actuator Ready

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Key Features

✓ Zero-Friction Metal Seat

Three offsets make the disc swing away from the seat immediately on opening — no rubbing, no wear, long cycle life.

✓ Class V Bubble-Tight Shutoff

Metal-to-metal sealing meets ANSI/FCI 70-2 Class V — ideal for steam, gas and flammable service.

✓ High Temperature to 550°C

Handles saturated and superheated steam, hot gas and thermal fluids that destroy rubber seats.

✓ Fire-Safe Construction

All-metal seat and fire-safe design meet API 607 requirements for flammable service.

✓ Quarter-Turn Speed

90° operation with manual gear, pneumatic or electric actuator — fast isolation and ESD response.

✓ Replaces Gate & Globe Valves

At a fraction of the weight and cost, with better shutoff and much faster operation.

Technical Specifications

Parameter	Specification
Design Type	Triple Offset, Metal-Seated (TOV)
Body Material	Ductile Iron GGG50 / Carbon Steel WCB / Stainless Steel CF8 (304) / CF8M (316)
Disc / Seat	SS316 / Hard-Faced Alloy, Metal-to-Metal
Size Range	DN50 – DN2000 (2" – 80")
Pressure Rating	PN16 / PN25 / PN40 (ANSI Class 150/300 on request)
Temperature	-196°C to +550°C
Leakage Class	ANSI/FCI 70-2 Class V
End Connection	Flanged (EN 1092 / ASME B16.5)
Operation	Manual Gear / Pneumatic / Electric
Fire Safe	API 607
Certification	ISO 9001:2015, SGS Material Test (MTC per batch)

Applications

⚑ Oil & Gas Pipelines

Mainline isolation, pigging, ESD and DBB service where fire-safe metal shutoff is required.

⚑ Steam Systems

Saturated and superheated steam isolation in power plants, refineries and district heating.

⚑ Chemical & Petrochemical

Corrosive and high-temperature process lines requiring metal-to-metal sealing.

⚑ LNG & Cryogenic

Down to -196°C for LNG and cryogenic gas service.

Frequently Asked Questions

What is a triple offset butterfly valve?

A TOV has three geometric offsets that make the metal disc contact the seat only at the fully closed position, with zero rubbing during opening and closing. This enables metal-to-metal Class V shutoff in steam, gas and high-temperature service.

What temperature can a triple offset butterfly valve handle?

Metal-seated triple offset butterfly valves operate up to 550°C, replacing gate and globe valves in high-temperature steam and process gas service.

Where are triple offset butterfly valves used?

TOVs are used in oil & gas pipelines, steam systems, chemical plants, power generation, LNG and other severe-service applications where bubble-tight metal shutoff and fire safety are required.

What is the difference between double offset and triple offset?

Double-offset valves have two offsets for reduced friction, typically with soft seats up to ~230°C. Triple-offset adds a conical seat geometry for metal-to-metal sealing, enabling Class V shutoff up to 550°C.

Triple Offset Butterfly Valves